Multi-homing Deployment Considerations for Distributed-Denial-of-Service Open Threat Signaling (DOTS)
draft-ietf-dots-multihoming-05

Document Type Active Internet-Draft (dots WG)
Authors Mohamed Boucadair  , Tirumaleswar Reddy.K  , Wei Pan 
Last updated 2020-11-23
Replaces draft-boucadair-dots-multihoming
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Network Working Group                                       M. Boucadair
Internet-Draft                                                    Orange
Intended status: Standards Track                                T. Reddy
Expires: May 27, 2021                                             McAfee
                                                                  W. Pan
                                                     Huawei Technologies
                                                       November 23, 2020

Multi-homing Deployment Considerations for Distributed-Denial-of-Service
                      Open Threat Signaling (DOTS)
                     draft-ietf-dots-multihoming-05

Abstract

   This document discusses multi-homing considerations for Distributed-
   Denial-of-Service Open Threat Signaling (DOTS).  The goal is to
   provide some guidance for DOTS clients/gateways when multihomed.

Status of This Memo

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   This Internet-Draft will expire on May 27, 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (https://trustee.ietf.org/license-info) in effect on the date of
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Boucadair, et al.         Expires May 27, 2021                  [Page 1]
Internet-Draft              DOTS Multihoming               November 2020

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Multi-Homing Scenarios  . . . . . . . . . . . . . . . . . . .   4
     4.1.  Residential Single CPE  . . . . . . . . . . . . . . . . .   5
     4.2.  Multi-Homed Enterprise: Single CPE, Multiple Upstream
           ISPs  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.3.  Multi-homed Enterprise: Multiple CPEs, Multiple Upstream
           ISPs  . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.4.  Multi-homed Enterprise with the Same ISP  . . . . . . . .   7
   5.  DOTS Multi-homing Deployment Considerations . . . . . . . . .   7
     5.1.  Residential CPE . . . . . . . . . . . . . . . . . . . . .   8
     5.2.  Multi-Homed Enterprise: Single CPE, Multiple Upstream
           ISPs  . . . . . . . . . . . . . . . . . . . . . . . . . .   9
     5.3.  Multi-Homed Enterprise: Multiple CPEs, Multiple Upstream
           ISPs  . . . . . . . . . . . . . . . . . . . . . . . . . .  11
     5.4.  Multi-Homed Enterprise: Single ISP  . . . . . . . . . . .  12
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  13
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   In many deployments, it may not be possible for a network to
   determine the cause of a distributed Denial-of-Service (DoS) attack
   [RFC4732].  Rather, the network may just realize that some resources
   seem to be under attack.  To improve such situation, the IETF is
   specifying the DDoS Open Threat Signaling (DOTS)
   [RFC8811]architecture, where a DOTS client can inform a DOTS server
   that the network is under a potential attack and that appropriate
   mitigation actions are required.  Indeed, because the lack of a
   common method to coordinate a real-time response among involved
   actors and network domains jeopardizes the efficiency of DDoS attack
   mitigation actions, the DOTS protocol is meant to carry requests for
   DDoS attack mitigation, thereby reducing the impact of an attack and
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